Files specifically tuned for 1366x768 screens. Boot Logo: Assets to display the Sony logo upon startup. Firmware Installation Process
The "1366x768" in your query refers to the specific display resolution of the panel the firmware is intended for. Download RD8503 Sony 1366x768 rar
The core firmware, often named something like SKR8503_100.bin or T.RD8503.bin . Files specifically tuned for 1366x768 screens